Sintesis Graphene Berbasis Arang Tempurung Kelapa Dengan Metode Hummers Termodifikasi

Khadifah, Filla Mulyawati and Nurisal, Ryan (2017) Sintesis Graphene Berbasis Arang Tempurung Kelapa Dengan Metode Hummers Termodifikasi. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini bertujuan untuk mengembangkan serta mempelajari karakterisasi teknik sintesis graphene dari arang tempurung kelapa. Metode Hummers Termodifikasi merupakan pengembangan dari metode Hummers yang telah banyak digunakan untuk mensintesis graphene dari grafit. Penelitian dimulai dengan mencampurkan arang tempurung kelapa yang telah dihancurkan dengan variasi ukuran 35 dan 200 mesh larutan H2SO4 dan serbuk NaNO3 di dalam icebath. Selanjutnya, ditambahkan serbuk KMnO4 secara perlahan lalu diencerkan dengan dilakukan penambahan air demin dan dipanaskan dengan variasi suhu 35°C, 80°C, dan 90°C. Selanjutnya larutan tersebut ditambahkan dengan larutan H2O2 dan didiamkan selama 6 jam untuk mengendapkan padatan lalu dilakukan pencucian. Variasi metode kalsinasi juga dilakukan di awal atau di akhir metode Hummers Termodifikasi. Metode kalsinasi yang digunakan adalah menambahkan activator KOH dengan perbandingan 4:1 dengan karbon, lalu dikalsinasi di dalam tubular furnace dengan dialirkan gas nitrogen pada suhu 400°C selama 1 jam dan 800°C selama 3 jam. Hasil uji karakteristik menunjukkan kemurnian, transparansi dan derajat oksidasi graphene meningkat namun kristalinitasnya menurun seiring kenaikan temperatur pemanasan dan penurunan ukuran bahan baku yang digunakan. Selain itu, metode kalsinasi yang digunakan di awal maupun di akhir metode Hummers Termodifikasi dapat meningkatkan luas permukaan partikel. =========================================================== This study aims to develop and study the characterization of graphene synthesis techniques from coconut shell charcoal. The Modified Hummers method is the development of the widely used Hummers method to synthesize graphene from graphite. The study began by mixing the crushed coconut shell charcoal that has variations of size 35 and 200 mesh with of H2SO4 and NaNO3 powder in icebath. Subsequently, the KMnO4 powder was slowly added and diluted by adding demineralized water and heated with temperature variations of 35°C, 80°C, and 90°C. Furthermore, the solution was added with H2O2 solution and allowed to stand for 6 hours to precipitate the solid then washed. Variations of calcination methods are also carried out at the beginning or at the end of the Modified Hummers method. The calcination method used by adding KOH as an activator with a ratio of 4 : 1 to carbon, then calcined in tubular furnace with nitrogen gas flowed at 400°C for 1 hour and 800°C for 3 hours. Characteristic test results show that the purity, transparency and degree of graphene oxidation increase but its crystallinity decrease with the increases of the heating temperature and the decreases of the size of the raw materials used. In addition, the calcination methods used at the beginning and at the end of the modified Hummers method can increase the particle surface area.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: karbon, arang tempurung kelapa, graphene, Hummers, carbon, coconut shell charcoal
Subjects: T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles.
T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial.
Divisions: Faculty of Industrial Technology > Chemical Engineering > 24201-(S1) Undergraduate Thesis
Depositing User: Ryan Nurisal .
Date Deposited: 28 Sep 2017 08:21
Last Modified: 06 Mar 2019 03:48
URI: https://repository.its.ac.id/id/eprint/44230

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